21142211000 has 64 divisors (see below), whose sum is σ = 49631568480. Its totient is φ = 8429740800.

The previous prime is 21142210987. The next prime is 21142211021. The reversal of 21142211000 is 11224112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279227 + ... + 346773.

Almost surely, 2^21142211000 is an apocalyptic number.

21142211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21142211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24815784240).

21142211000 is an abundant number, since it is smaller than the sum of its proper divisors (28489357480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142211000 is a wasteful number, since it uses less digits than its factorization.

21142211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67881 (or 67867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21142211000 its reverse (11224112), we get a palindrome (21153435112).

The spelling of 21142211000 in words is "twenty-one billion, one hundred forty-two million, two hundred eleven thousand".